One hundred twenty seven Byzantine coins, one for each Byzantine emperor, plus the few usurpers who struck coins are presented in this online exhibition. All the objects have been selected from the Dumbarton Oaks Byzantine Coin Collection in order to present the viewer with a glimpse into one of the largest Byzantine coin collections in the world.

The Aztec, Maya, and Inca civilizations used complex and multiple timekeeping systems for purposes of agriculture, worship, and political authority. Because little of the material record of the pre-Conquest peoples of the Americas survived, scholars through the ages have had limited primary sources to study to reach a comprehensive understanding of timekeeping in the Americas.

For over a thousand years the Byzantine Emperor ruled as God's regent of earth. The decisions of the individuals who sat on the throne had repercussions throughout the Byzantine world and far beyond. Decrees, letters, judgments, and commands left Constantinople every day signed by the emperor in red ink and secured with the imperial seal. The designs of the imperial seals provide an insight into the minds and policies of the rulers whose image they bore; they tell us not only how they wished to be viewed by the recipients of their letters, but also how they viewed themselves.